[Intel-gfx] [CI] HAX sched/core: Paper over the ttwu() race [take two]

On all Core platforms we see <4> [181.766629] WARNING: CPU: 0 PID: 1524 at kernel/sched/core.c:2388 ttwu_queue_wakelist+0xbc/0xd0 <4> [181.766637] Modules linked in: i915(+) vgem snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio amdgpu mei_hdcp x86_pkg_temp_thermal coretemp crct10dif_pc

[Intel-gfx] [CI] HAX sched/core: Paper over the ttwu() race

On all Core platforms we see <4> [181.766629] WARNING: CPU: 0 PID: 1524 at kernel/sched/core.c:2388 ttwu_queue_wakelist+0xbc/0xd0 <4> [181.766637] Modules linked in: i915(+) vgem snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio amdgpu mei_hdcp x86_pkg_temp_thermal coretemp crct10dif_pc